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Which number is the odd one out, 1, 4, 9, 16, 23, 25, 36

Each of the numbers except 23, is perfect square..

71 , 25 , 83 , 37 , 95 , 49 , ?

Two parallel series both with adding 12..

O , R , M , T , K , V , I , ?

Two parallel series one with skipping one alphabet in reverse order and other with skipping one alphabet in forward order..

36 , 72 , ? , 144 , 180 , 216 , 252

Add 36 each time..

759 , 675 , 335 , 165 , ?

Each number is formed by multiplying the number formed by the first two digits of the previous number by its third digit.! !So, 16 * 5 = 80.

1 , 2 , 4 , 8 , ?

Add 1 first and then add double of previously added number..

0 , 1 , 4 , 9 , 16 , 25 , 36 , 49 , ?

Add 1, 3, 5, 7, etc..

7964325 is to 6975234 , 5822139 is to 2859312 as 7469851 is to ?

Reverse the first three digits then reverse the last four digits..

O , P , R , U , ?

Skip 0 , 1 , 2 , 3,... alphabets..

1.5 , 3 , 5.5 , 9 , 13.5 , ?

Add 1.5, 2.5, 3.5, 4.5, 5.5.

2 , 20 , 42 , 68 , 98 , ?

Add 18 , 22 , 26 , 30 , 34,....

1 , 4 , 9 , 61 , 52 , ?

Square 1 , 2 , 3,... and change the sequence of digits..

B , D , G , K , P , ?

Skip 1 , 2 , 3,... alphabets..

C , F , K , R , ?

Skip 2 , 4 , 6 , 8,... alphabets.

2 , 6 , 18 , 54 , 162 , ?

Multiply previous term with 2 to find next term..

3.4 , 6.3 , 9.2 , 12.1 , 15 , ?

Add 2.9 in previous term to find next term..

20 , 30 , 45 , ?

Multiply previous term with 1.5 to find next term..

Which is the odd number out, 9421 , 7532 , 9854 , 8612 , 6531 , 8541 ?

All the other numbers have their digits in descending order..

5 , 5 , 3 , -1 , -7 , ?

Subtract 0 ,2 , 4,....

Which number is the odd one out, 8, 27, 64, 100, 125, 216, 343

All others are perfect cube of any number but 100 is not the perfect cube of any number..

78214 and 292 , 38421 and 459 , 69517 and ?

78 + 214 = 292!38 + 421 = 459! !So, 69 + 517 = 586.

6 , H , 9 , K , 11 , M , 14 , P , 16 , R , 19 , U , 21 , ?

Add 3 and 2 alternatively in number series and skip 2 and 1 alphabets alternatively.

Which number is the odd one out, 2, 5, 10, 17, 26, 37, 50, 64

(1*1)+1 , (2*2)+1 , (3*3)+1 , (4*4)+1 , (5*5)+1 , (6*6)+1 , (7*7)+1 , (8*8)+1! !But, 64 is out of pattern..

6 , 8 , 10 , 14 , 18 , 26 , 34 , 50 , 66 , ?

Add 2, 4, 4, 8, 8, 16, 16,....

XYZ , WVV , VSR , UPN , ?

Subtract 1 from first 3 from second and 4 from third character..

Which number is the odd one out, 1, 4, 9, 16, 20, 36, 49

All other numbers are perfect square of numbers but 20 is not perfect square of any number..

Find the odd man out, 3, 5, 11, 14, 17, 21

Each of the numbers except 14 is an odd number.! !The number '14' is the only EVEN number..

Which number is the odd one out, 159, 248, 963, 357, 951, 852 ?

In the rest there is the same difference between each digit! eg 8 (-3) 5 (-3) 2.

1 , 1 , 2 , ? , 24 , 120 , 720

Multiply by 1, 2, 3 and so on....

Which number is the odd one out, 396, 462, 572, 427, 671, 264

In each number except 427, the middle digit is the sum of other two..

100 , 98 , 94 , 88 , 80 , 70 , ?

Deduct 2, 4, 6, 8, 10, 12.

N , N , P , L , S , I , W , ?

Two parallel series. One with skipping 1 , 2 , 3,... alphabets in forward order and other with skipping same alphabets in reverse order..

B , C , E , G , K , ?

Prime numbers 2, 3 , 5 , 7 , 11 , 13,....

4 , 7 , 15 , 29 , 59 , 117 , ?

Multiply with 2 and subtract and add 1 alternatively..

Which number is the odd one out, 6, 9, 15, 21, 24, 28, 30

Each of the numbers except 28, is a multiple of 3..

1 , 4 , 2 , 5 , 3 , 6 , 4 , ?

There are two interwoven sequences.! !First starts with 1 and second with 4!Add 1 in both series.

B , L , R , T , ?

Skip alphabets 10 , 6 , 2 , -2 , -6,....

1/3 , 3/7 , 6/13 , 10/21 , 15/31 , ?

Add 2 , 3 , 4,... in numerator and add 4 , 6 , 8,... in denominator..

17 , 34 , 51 , 68 , ?

Add 17 each time..

Which number is the odd one out, 331, 482, 551, 263, 383, 362, 284

In each number except 383, the product of first and third digits is the middle one..

F , I , M , P , T , W , ?

Skip 2 and 3 alphabets alternatively..

0 , 100 , 6 , 94 , 12 , 88 , 18 , 82 , ? , ?

There are two sequences interwoven.! !Add 6 starting at 0 and deduct 6 starting at 100..

6 , 10 , 18 , 34 , 66 , ?

Add 4 , 8 , 16 , 32,....

110 , ? , 99 , 81 , 72 , 63 , 54 , 45

Deduct the sum of the digits of the previous number each time..

A , B , D , I , ?

Multiply position of previous alphabet with 3 and subtract 1 , 2 , 3,... respectively..

B , W , F , P , M , E , ?

Two parallel series one with skipping 3 , 6,... alphabets and other with skipping 6 , 12,... alphabets..

F , O , T , W , ?

Skip 8 , 4 , 2 , 1 alphabets..

100 , 1 , 97.5 , 3.5 , 92.5 , 8.5 , 85 , 16 , ? , ?

There are two interwoven sequences.! ! subtract 2.5, 5, 7.5 starting at 100 and Add 2.5, 5, 7.5 starting at 1..

2 , 6 , 15 , 34 , 73 , ?

Multiply with 2 and add 2 , 3 , 4 , 5 , 6,....

180 , 140 , 179 , 138 , 177 , 134 , ?

Two parallel series, one with subtracting 1,2,3,... and other with subtracting 2,4,6,....

M , F , N , G , R , I , S , L , W , P , ?

Two parallel series one with skipping 0 and 3 alphabets alternatively and other with skipping 0 , 1 , 2,....

17 , 20 , 19 , 22 , 21 , 24 , 23 , ?

Add 3 and subtract 1 alternatively..

3925 and 277 , 4697 and 2416 , 6257 and ?

3 * 9 = 27! 5 + 2 = 7!(277).! !4 * 6 = 24!and 9 + 7 = 16!(2416)! !Similarly,!6 * 2 = 12!and 5 + 7 = 12!(1212).

100 , 97 , 91 , 82 , ?

-3 , -6 , -9 , -12!(Multiples of 3 are subtracted).

Which number is the odd one out, 10, 25, 45, 54, 60, 75, 80

Each of the numbers except 54 is multiple of 5..

Which two letters come next in the sequence A , D , I , P , Y , CF , DI , FD , ?

take the numerical position of each letter in the alphabet to reveal the sequence of consecutive square numbers 1, 4, 9, 16, 25, 36, 49, 64, 81.

1000 , 971.4 , 942.8 , 914.2 , 885.6 , ?

Deduct 28.6 each time..

A , Y , W , U , S , Q , ?

Skip one alphabet in reverse order..

B , D , F , H , J , L , ?

Skip one alphabet..

5 , 26 , 131 , 656 , ?

Multiply by 5 and add 1 each time..

9 , 18 , 27 , ? , 45 , ? , 63

Add 9 each time..

63 , 35 , 15 , 3 , ?

8^2 - 1 = 63!and!6^2 - 1 = 35!and!4^2 - 1 = 15!and!2^2 - 1 = 3!in the same way!0^2 - 1 = -1.

12 , 14 , 34 , 36 , 56 , 58 , 78 , ?

Add 2 and 20 alternatively..

F , G , I , L , P , ?

Skip alphabets 0,1,2,....

1 , 2.65 , 4.3 , 5.95 , 7.6 , ?

1.65 is adding in each term..

0 , 3 , 8 , 15 , ?

Add 3 , 5 , 7,....

3 , 6 , 9 , 12 , 15 , ?

Add 3 in previous term to find next term..

-6 , 9 , -27/2 , 81/4 , -243/8 , ?

Multiply previous term with -3/2 to find next term..

64521 is to 41256 as 38297 is to..

A B C D E!6 4 5 2 1! !B E D C A!4 1 2 5 6! !A B C D E!3 8 2 9 7! !B E D C A!8 7 9 2 3.

25 , 50 , 27 , 46 , 31 , 38 , 39 , ?

There are two interwoven sequences.!Add 2, 4 and 8 from the sequence starting with 25!and subtract 4, 8 and 16 from the sequence starting with 50.

Which number is the odd one out, 835, 734, 642, 751, 853, 981, 532

In each number except 751, the difference of third and first digit is the middle one..

BZ , EW , HT , KQ , ?

Skip 2 alphabets in forward order to find first alphabet and skip 2 alphabets in reverse order to find 2nd alphabet..

14 , 16 , 28 , 32 , 42 , 48 , 56 , 64 , ? , ?

There are two interwoven sequences, add 14 starting at 14 and add 16 starting at 16..

156 , 76 , 36 , 16 , ?

Subtract 4 from previous term and then divide it with 2 to find next term..

2 , -1 , 2 , -1 , 2 , ?

Subtract and add 3 alternatively..

Which number is the odd one out, 16, 25, 36, 72, 144, 196, 225

Each of the numbers except 72 is a perfect square..

3/81 , 4/256 , 5/625 , ?

Add 1 in numerator and in denominator!(3*3)^2 = 81!(4*4)^2 = 256!(5*5)^2 = 625!in the same way!(6*6)^2 = 1296.

2 , 7 , 5 , 5 , 8 , 3 , 11 , ?

Two parallel series one with adding 3 and other with subtracting 2..

9 , 11 , 17 , 35 , ?

Add 2 , 6 , 18 , 54,...!here!6 = 2*3!18 = 6*3!and!54 = 18*3.

Which number is the odd one out, 10, 14, 16, 18, 21, 24, 26

All numbers are even except 21..

100 , 96.75 , 93.5 , 90.25 , 87 , ?

Deduct 3.25 each time..

87 , 102 , 119 , 138 , 159 , ?

Adding 15 , 17 , 19,....

A , E , X , H , U , ?

Two parallel series, one with skipping two alphabets in reverse order and other with skipping two alphabets in forward order.

C , G , L , R , ?

Skip 3 , 4 , 5,... alphabets..

T , Q , M , H , ?

Skip 2 , 3 , 4,... alphabets in reverse order..

100 , 50 , 200 , 25 , 400 , ?

There are two interwoven sequences.! ! Multiply 2 starting at 100 and devide by 2 starting at 50..

3 , 10 , 33 , 104 , ?

Multiply with 3 and add 1, 3, 5, 7,....

Which number is the odd one out, 41, 43, 47, 53, 61, 71, 73, 81

Each of the numbers except 81 is a prime number..

E , H , K , N , Q , T , ?

Skip two alphabets..

108 , 189 , 216 , 225 , ?

Add 81 , 27 , 9 , 3,....

1/32 , 1/16 , 1/4 , 1/2 , 2 , 4 , ?

Multiply with 2 and 4 alternatively.

0.67 , 0.69 , 0.48 , 0.88 , 0.29 , 1.07 , ?

There are two series!Subtract 0.19 from the series starting with 0.67 and add 0.19 from the series starting with 0.69..

2 , 14 , 32 , 56 , 86 , ?

Add 12 , 18 , 24 , 30 , 36,....

2 , 5 , 10 , 17 , 26 , ?

add 3 , 5 , 7 , 9 , 11,....

C , F , J , O , ?

Skip 2 , 3 , 4,... alphabets..

7 , 10 , 25 , 94 , 463 , ?

7*2 - 4 = 10!and!10*3 - 5 = 25!and!25*4 - 6 = 94!and!94*5 - 7 = 463!In the same way!463*6 - 8 = 2770.

X , U , Q , N , J , G , ?

Skip 2 and 3 alphabets alternatively in reverse..

492 , 366 , 189 , 810 , ?

8 * 1 = 8, 8 + 0 = 8.

Which number is the odd one out, 3, 5, 7, 12, 17, 19

Each of the numbers is a prime number except 12..

0 , 7 , 15 , 24 , 34 , ?

add 7 , 8 , 9 , 10 , 11,....

AZ , DX , HU , MQ , ?

skip 2 , 3 , 4,... alphabets to find first character and subtract 1 , 2 , 3,... alphabets to find second character..

9 , 16 , 13 , 13 , 17 , 10 , 21 , 7 , ?

There are two interwoven sequences! !Add 4 starting with 9! !and subtract 3 starting with 16..

1 , 1 , 3 , 15 , 105 , ?

Multiply by 1, 3, 5, 7, 9.

7 , 12 , 19 , 28 , ?

add 5 , 7 , 9 , 11,....

What four-digit number should replace the question mark? 4342 (3176) 1726, 7995 (7516) 2162, 8418 (????) 1725

Delete the digits outside the brackets that appear twice, and insert the remaining digits in the brackets in the same order that they appear outside the brackets!8418 (4725) 1725.

5 , 2.5 , 1.25 , 0.625 , ?

Divide previous term with 2 to find next term..

7 , 13 , 24 , 45 , 86 , ?

Multiply previous term with 2 and subtract 1 , 2 , 3,... to find next term..

1 , 1 , 2.5 , 3.5 , 4 , 6 , 5.5 , 8.5 , ? , ?

There are two interwoven sequences.! !+1.5 starting at the first 1, and +2.5 starting at the second 1..

7/2 , 4 , 7 , 14 , ?

Multiply previous 2 numbers and divide by 2..

3 , 7 , 2 , 47 , ?

3^2 - 7 = 2!7^2 - 2 = 47!In the same way!2^2 - 47 = -43.

8 , 16 , 32 , 64 , 128 , ?

Multiply previous term with 2 to find next term..

1 , 2 , 3 , 5 , 7 , 10 , 13 , 17 , 21 , ? , ?

+1, +1, +2, +2, +3, +3, +4, +4, +5, +5.

2 , 5.75 , ? , 13.25 , 17 , 20.75

Add 3.75 each time..

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